Safety device for elevators.



'No- 887,804. PATENTED DEC. 4, 1906.

M. J. DELANEY. SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED 00124, 1906.

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attain MARTIN J. DELANEY, OF SILVER CREEK, PENNSYLVANIA.

SAFETY DEVICE FQR ELEVATORS.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed October 24, 1905. Serial No. 234,217.

elevators designed especially for use in mineshafts, and has for itsobjects to produce a comparatively simple inexpensive device of thischaracter which will positively and effectually stop the car in theevent of the elevatorrope breaking, one wherein the safety members willbe thrown automatically into en gagement with the car-guides, and one inwhich the memb ers will have a sufficient range of movement to clutchthe guides in the event of the latter spreading.

With these and other objects in view the invention comprises the novelfeatures of construction and combination of parts more fully hereinafterdescribed.

In the accompanying drawings, Figure 1 is an elevation of a mine-carequipped with a safety device embodying the invention. Fig. 2 is asimilar view, partly in section, showing the clutches in engagingposition. Fig. 3 is an enlarged detail plan view of one of the clutches.

Referring to the drawings, 1 designates the elevator-car arranged fortravel between vertical guides 2 and adapted for movement through themedium of an elevator rope or cable 3, equipped at its lower end with acoupling member or link 4:, there being attached to the car 1 verticalanglebars 5, arranged in pairs and spaced to bear upon opposite sides ofthe guides 2. These parts may all be of the usual or any preferredconstruction and material and are adapted in practice to perform theirordinary functions.

' Connected in the car-frame l is a head member comprising a pair ofrelatively spaced plates or webs 6, between which there is disposed apair of clutching members or levers 7, designed for engagement,respectively, with the guides 2, these levers being keyed to and forrotation with pivoting members or shafts 8, journaled in the head andhaving bearing in suitable openings formed in the plates 6, while coiledupon the ends of the shafts 8, which project beyond the outer faces ofthe plates, are springs 9, each fixed at one end to the adjacent plateand at its other end to the shaft and tending to rotate the shafts in adirection for moving the levers 7 into engagement with the guide-rails.The levers 7, which are of substantially L shape, present dependingengaging portions or arms 10, having their outer or active faces curvedand provided with transversely-extending engaging teeth 11, designed tobite into the material of the guides 2 when the levers are thrown intoengaging position.

Pivoted to the inner ends of the substantially horizontal portion orarms of the clutch-levers are links 12, engaged at their upper ends withthe coupling member 4, with which is also engaged a pair of flexibleelements or chains 13, attached at their lower ends to the couplingmembers 14, pivoted between the plates 6 of the frame-head.

In practice the car or cage 1 is operated in the usual manner, and inthe event of the rope 3 breaking the springs 9 operate for rotating theclutching-levers on their axes and throwing their active toothed faces11 into contact with the guide-rails 2, whereupon, and owing to saiddevices being curved, the weight of the cage acting on the levers servesto rotate the latter for forcibly embedding the teeth 11 into thematerial of the guiderails, whereby the car is immediately andefiectually brought to a standstill. It is to be observed in thisconnection that the range of movement of the levers 7 is such thatshould the guide-rails '2 spread relatively through any cause clutchingengagement of the levers therewith will be insured.

Having thus fully described my invention, what I claim as new is- In anelevator, a pair of vertical guiderails, a car arranged for traveltherebetween and having a frame including a pair of relatively spacedhead-plates, a flexible operating element connected with and forsustaining the car, rotary shafts journaled in said plates andprojecting beyond the outer faces of the latter, clutch-levers keyedonto said shafts for movement therewith, said levers being arrangedbetween the plates and of substantially L shape presenting dependingengaging portions having curved active faces disposed toward theguide-rails and adapted to swing in an arc, the line of which intersectsand extends outwardly beyond the inner faces of the rails, and springscoiled on the projecting portions of the shafts and tending to rotatethe latter in a direction for throwing l the active portions of theclutch-levers into contact with the guide-rails, the depending portionsof the levers being designed through 5 frictional contact with the railsto swing upwardly and outwardly into secure clutching engagement withthe rails,

MARTIN J. DELANEY.

Witnesses J. LINEAWEAVER, FRANK LITTLE.

